Cohesion Failure
Mostrando 1-12 de 17 artigos, teses e dissertações.
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1. Proposal of a failure envelope for artificially cemented sand
Abstract Soils are particulate materials, which often stand out for their low shear strength. In most cases, this aspect justifies adapting the geotechnical project for this characteristic, which can be even more problematic in the case of soft sands, since it often occurs in superficial layers in various parts of the metropolitan region of Fortaleza. Theref
REM - International Engineering Journal. Publicado em: 2022
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2. Micro-shear bond strength and surface micromorphology of a feldspathic ceramic treated with different cleaning methods after hydrofluoric acid etching
Objective: The aim of this study was to evaluate the effect of feldspathic ceramic surface cleaning on micro-shear bond strength and ceramic surface morphology. Material and Methods: Forty discs of feldspathic ceramic were prepared and etched with 10% hydrofluoric acid for 2 minutes. The discs were randomly distributed into five groups (n=8): C: no tre
J. Appl. Oral Sci.. Publicado em: 2014-04
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3. Adesão metal-polímero: dispositivos de medição e correlações físico-químicas
Uma maneira de quantificar a resistência da interface de materiais compósitos é medindo a tensão necessária para separar o filme do substrato. Esta tensão é frequentemente usada como um parâmetro de projeto para desenvolver estes materiais. Entretanto, muitos métodos de medição da adesão não são capazes de eliminar as falhas de coesão das falh
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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4. Water level behavior evaluation in upstream tailing dam. / Avaliação do comportamento do nível dágua em barragem de contenção de rejeito alteada a montante.
Among the main building methods of tailings dams, the upstream method is undoubtedly the most vulnerable to the occurrence of the failure originated by the power of seepage groundwater through the embankment. In a reservoir-dam system having low cohesion slimes, such as tailings dams, the power of seepage groundwater benefits the installation of internal ero
Publicado em: 2008
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5. Judging the case of Richthofen: representations expressed in social digital media. / O julgamento do caso Richthofen: representações sociais expressas na midia digital.
We understand, from a ethnomethodology, the social representations of violence and crime built around the trial the "If Richthofen." The question of law, or rather, the breach of the Act represented in the act of Suzane Richthofen, and plan to kill their parents is, above all, a rip ties of the constitution of the social pact around the Power (Social / pater
Publicado em: 2008
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6. A experiência da cooperativa dos empreendedores rurais de Jussara : subsídios para políticas de desenvolvimento territorial sustentável no semi-árido
The territorial approach to development has turned out as an adequate analytical mechanism towards both understanding the changes taking place in rural Brazil and subsequently building strategies for the sustainable development of such areas. Within this framework, the dynamism of some rural spaces has been quoted in the literature as largely resulting from
Publicado em: 2008
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7. UM ESTUDO EXPERIMENTAL UTILIZADO EM TOMOGRAFIA DE RAIO-X COM MECANISMOS ASSOCIADOS A PRODUÇÃO DE AREIA EM POÇOS DE PETRÓLEO / AN EXPERIMENTAL STUDY USED IN X-RAY TOMOGRAPHY WITH MECHANISMS ASSOCIATED THE SAND PRODUCTION IN OIL WEELS
Frequently, during the production stages of an oil well, simultaneous production of solid particles originating from the surrounding rock mass occur, a process called sand production. Stress concentrations around of the well may cause loss of cohesion between grains, thus creating a region of loose granular matter susceptible for drag bye seepage forces. The
Publicado em: 2007
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8. Development of a hypoplastic model that represents overconsolidation effects. / Desenvolvimento de um modelo hipoplástico que represente efeitos do sobreadensamento.
Modifications in a hypoplastic model are proposed intending to represent the mechanical behavior of overconsolidated clays. The overconsolidation ratio, the cohesion intercept and indices that represent overconsolidation characteristics are introduced in the model, resulting in parameters with a clear physical meaning and of easy to determine. The constituti
Publicado em: 2006
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9. Análise de estabilidade de taludes em solos de alteração de rochas metamórficas do Quadrilátero Ferrífero / Slope stability analysis in soils of alteration of metamorfic rocks of Quadrilátero Ferrífero
The present work has the aim of improve the knowledge on the mechanical behavior of several materials occurring in the slopes of the Pico mine, in Quadrilátero Ferrífero area, Minas Gerais State. Triaxiais tests and direct shear tests of undisturbed samples collected in situ were performed in order to obtain strength parameters under several loading condit
Publicado em: 2006
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10. EXPERIMENTAL STUDY OF MECHANISMS OF SAND PRODUCTION USING X-RAY COMPUTERIZED TOMOGRAPHY / ESTUDO EXPERIMENTAL DOS MECANISMOS DE PRODUÇÃO DE AREIA EMPREGANDO TOMOGRAFIA COMPUTADORIZADA DE RAIOS-X
During productive phase of the well, manytimes there is simultaneous production of the solid particles detached from matrix of the reservoir rock. This phenomenon receive the name of the sand production. In this case stress and flow conditions around of the well are fundamental factors for deflagration of the process. Stress concentration in the wall of the
Publicado em: 2004
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11. Studies of haspin-depleted cells reveal that spindle-pole integrity in mitosis requires chromosome cohesion
Cohesins and their regulators are vital for normal chromosome cohesion and segregation. A number of cohesion proteins have also been localized to centrosomes and proposed to function there. We show that RNAi-mediated depletion of factors required for cohesion, including haspin, Sgo1 and Scc1, leads to the generation of multiple acentriolar centrosome-lik
Company of Biologists.
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12. Saccharomyces cerevisiae CTF18 and CTF4 Are Required for Sister Chromatid Cohesion
CTF4 and CTF18 are required for high-fidelity chromosome segregation. Both exhibit genetic and physical ties to replication fork constituents. We find that absence of either CTF4 or CTF18 causes sister chromatid cohesion failure and leads to a preanaphase accumulation of cells that depends on the spindle assembly checkpoint. The physical and genetic interact
American Society for Microbiology.